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Show that four points (0,-1),(6,7),(-2,3...

Show that four points `(0,-1),(6,7),(-2,3)a n d(8,3)` are the vertices of a rectangle. Also, find its area.

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Given,Points `A (0 , -1) , B (6 , 7) , C ( -2 ,3)` and `D (8 , 3)`
`AB=sqrt((6−0)^2+(7+1)^2)=sqrt(36+64)=10`
`CD=sqrt((8+2)^2+(3−3)^2)=sqrt(100+0)=10`
`AD=sqrt((8−0)^2+(3+1)^2)=sqrt(64+16)=4sqrt5`
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